Reactive Hot Pressing of Alumina-Molybdenum Disilicide Composites

Author

William Fahrenholtz, Missouri University of Science and TechnologyFollow
Ronald E. Loehman
Kevin G. Ewsuk

Abstract

Al₂O₃-MoSi₂ Composites Were Prepared by Reactive Hot Pressing using Molybdenum, Aluminum, and Mullite Powders as Precursors. the Gibbs Free Energy Was Highly Negative for the Composite-Forming Reaction, Which Indicated that the Products Were Stable Relative to the Reactants. after the Reaction, the Composites Had High Relative Density, ∼96%. based on the Composite-Forming Reaction, the Composites Should Have Contained 18 Vol% MoSi₂ in an Al₂O₃ Matrix. Scanning Electron Microscopy Revealed that the MoSi2 Inclusions Were Elongated, with an Average Thickness of ∼5 Μm and Inclusion Lengths that Ranged from 5 to 50 Μm. Average Composite Strength Was 467 MPa, and Toughness Was 3.7 MPa·m^1/2.

Recommended Citation

W. Fahrenholtz et al., "Reactive Hot Pressing of Alumina-Molybdenum Disilicide Composites," Journal of the American Ceramic Society, vol. 85, no. 1, pp. 258 - 260, Wiley, Jan 2002.

The definitive version is available at https://doi.org/10.1111/j.1151-2916.2002.tb00076.x

Department(s)

Materials Science and Engineering

International Standard Serial Number (ISSN)

0002-7820

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2023 Wiley, All rights reserved.

Publication Date

01 Jan 2002